This week the fetus is growing a stronger heart and the legs are growing more as well. The baby will begin having rapid eye movement while asleep indicating that they are now capable of dreaming.
Maternal Changes on Week 21
The uterus is now a half inch above your belly button and your total weight gain is ten to fifteen pounds by now. Your hormones should be more stabilized by now and you will feel pretty good and comfortable.
Pregnancy most commonly lasts 40 weeks, this website provides information of a general nature and is not a replacement for professional healthcare advise. There are many factors that can influence a pregnancy due date including age, ethnicity, number of previous children, and length of menstrual cycle. Every woman's pregnancy is different and the due date can only be estimated within a certain degree of accuracy.